Viessmann Vitodens 333 Service Instructions Manual page 96
Compact gas fired condensing boiler. 4.2 to 19 kw natural gas and lpg version
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Also See for Vitodens 333:
- Service instructions manual (132 pages) ,
- Instruction manual (16 pages) ,
- Technical manual (180 pages)
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Function description
Extensions for external connections
Internal extension H2 (accessories)
The internal extension H2 is inte-
grated into the control unit housing
instead of the internal extension H1.
The cylinder primary pump is con-
nected to relay output sK.
96
(cont.)
An extractor can be switched OFF via
connection aBJ when the burner
starts.
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